Eccentric or draw rod for stone crushers



Jan. 24, 1933. HELMRICH 1,895,390

ECCENTRIG OR DRAW ROD. FOR STONE CRUSHERS Filed Jan. 15. 1931 x w m Patented Jan. 24, 1933 rnrnnnron HELMRIGH, or MAGDEBURG GERMANY,'ASSIGNOR mo THE FIRM 11mm,;

JCRUPP GRUSONWERK AKTIENGESEL'LSCHAFT, OF MAGDEBUBG-BUCKAU,GERMAN EdoENTRIc on nnawnon non STONE cnusnnns Application filed .lanuary 13, 1931, SerialKo. 508,502, and in Germany February 2, 193i).

The present invention has reference to an eccentricirodor draw rod for stone crushers, ofthe type formed with a head adapted to embrace the bearing surrounding the ec'centric. Known constructions of "such eccentric rods present several inherent. drawbacks.

The assembling and "dismantling of the brasses or bushes'is diflicult; the action of the cooling andrlubricating"devices'is' also unsatisfactory and their points of application are not advantageously situated. Q As a result of this invention all these drawbacks are obvi:

ated, by predetermining the dimension of the head in the axial direction and recessing the draw rod immediately below the bearing by .ditions are more favourable and the dismantling of the bearings is facilitated, largely on account of the recess in the draw rod. Re-

placement of the brasses or bushes has heretofore been greatly hampered, in the longitudinal direction of the draw rod by the lateral -shaft bearings, and in the axial direction by the fly wheels located close to the shaft bearings. The removal of the brasses or bushes was also diflicult inasmuch as a grasp of the .bushes according to the type of construction hitherto used was hardly possible, especially in view of the considerable weight of the brasses or bushes, which, for example, in the case of large stonecrushers amounts to from The invention consists in the fact that the head of the draw rod is made of such a breadth that the brasses can be drawn out sideways between the draw rod'and the fly wheels, whilst the recess around the lower bearing brass extends in the longitudinal direction of the draw rod by at least the distance between the axis of either side bearing and its upper extremity.

From such a construction of draw rod there, consequently, result the following advantages in comparison with those already known. The brasses can be very easily grasped, which is of. advantage in view of their great weight, and they are, furthermore, easy of access in order to determine their temperature. This is necessary, if con} v sideration be given to the'great' p e s curring when crushing stones or the like in conjunction with the aforesaid considerable normal weight of the brasses, whereby execs sive heating may be produced; Now, due to the fact that the brasses projectaxially be yond the head of the rod, this heating isisub f stantially reduced on account of the cooling effect of the air circulated by the movement of the head. However, watercoolingcan also be much better utilized than heretofore since the. cooling pipe, which is connectedto the cooling medium container as by arubber pipe for example, may connect, at the periphery of the brass with the cooling medium conduit provided inside'the brass, whereas, according, to the type of construction hitherto used, in which the brass did not project, delivery of'the cooling medium had totake place at an end surface ofthebrass,'but ths was ex tremely diflicult owing to the contiguous side bearings. In the present case it is nolongen necessary that the lubricating slots lie ingt-he neighbourhood of the greatest pressure as heretofore, as they maybe mounted in a plane y i which approaches theax-ial plane lying trans-" versely to the length of the draw rod sothat i Q the lubricating medium'can be better 'dis-- tributed in the bearing Thereis, finally, the;

advantage, which is of considerable value,

that, owing to the restricted axial dimension of the'head, anyer'rors in the parallelfa'r rangement oft-he elbow lever plates trans mitting power to the crushing blade may be counterbalanced. I

r In the accompanying drawing, which shows one example of draw rod in accordance with 1 the'invention, a

Figure 1 is a cross sectiorr through the head-ofthe draw'rod, and '1 5. Figure 2" an axial sectionthrough the head' bearing and lateral bearings,"showing also; theifly wheels. 7 a f f n-5 1 isthehead of the drawrod, the axial. length of which, asseenin Figure 2, must=v not exceed the difierence between: the dish t ance, 3 separating the fly'wheels2 anddou ble the lengths, of the Masses-5,5 of theeccentric. rod. The recess 3 in the drawwrod immediately below its bearing must be .of vsuch a length a9 that the clearance between vthe outer surface of the innerbrass and the opposite edge of therib 4 is not less than the distance between the centre'of the axis of either lateralbearing 6 and the upper sur-.,

faceoffthe bearing cover 7 or, infthe present 1 example, the upper end ofthe' bearing cover screws 8. In Figure there is shown in dotand-dash lmesth'e position of a bearing brass 9 as withdrawn; and also the corresponding igure 1) V 1 s may, be seen'from'Figure 1, a lubricating, v

cup 10'may be insertedclose to thehorizon- 5 is carried by screw bolts 12 and pressed against the upper bearing brass 5 so that it is prevented. from rotation and isat the same time held firmlyin position.

What I claim is I :In the combination of a stone crusher, a drive shaft,.an eccentric on said drive shaft, lateral bearings for said shafton both sides of said eccentric, a "flywheel mounted on said shaft beyondone of said lateral bearings, a bearing bush composed of two semi-cylindriposition of the draw rod head 1 (see also drive shaft, an eccentric on said drive shaft,

3. In the combination of a stone crusher, a 1

lateral bearings for said shaft symmetrically mounted upon both sides of said eccentric, flywheels'mounted on said shaft beyond said 7 lateral bearings, abearin bush composed of two semi-cylindrical h ves disposed upon said eccentric, a draw rod having a head in:

t'egralg'tlierewith fixed to the bearing bush, thea'xial length of'said'head being'less'thanthe difference between the distance separating the flywheels and doublethe length of the bearing bushyto permit the lateral removal of said bush intermediat a tl Qihead of the draw rod and either flywhfelyand a recess in said draw rod immediately below said bearing bush to permit the radial movemen'tj of said head and bush an extent sufficient to 1 clear the upper external boundaries of said- 2 ,85 4. The combination claimed in;,;claim 2,

lateral bearings wherein lubricating means is appliedf to' the v a peripheral surface of the bearing bushat the y side of the head of the draw. rodQ V 5. The combination claimed in 7 claim 12,

wherein cooling means is applied to the .pe.-.

ripheralsurface of the bearing, bush at th e side of the head of the draw rod. p FRIEDRICH ,HELMBICH.

cal halves disposed upon said eccentric, a'

draw rod having a head integral therewith fixed to the bearing bush, a recessin said head immediately below the bearing bush at least as long as the distancebetweenthe axis of oneof the lateralbearings and the upper w 1 extremity thereof, said head being shorter. in V axial length thansaid bearing bush and centrally disposed upon said bush, having the v edge thereof nearer the flywheel spaced from said flywheel a distance greater than the axial length of said bearing bush.

2. In the combinat'on ofa stone crusher, a

, drive shaft, an'eccentric on said drive shaft,

lateral bearings for said shaft on both sides ofsaid eccentric, a flywheel mounted on said shaft-beyond one of said lateral bearings, a

bearing; bush composed of two semi-cylin- I drical halves disposed upon said eccentric, a

draw rod'having ahead integral therewith of smaller axial length thansaid bearing I lateral removal of said bush intermediate thev head of the draw rod and the flywheel, and

of. said lateral bush mounted upon said bush, the edge of said a head near vthe flywheel being spaced from said flywheel a distance greater than the axial length of said bearing bush to permit the arrecessin said draw rod immediately below W filo said bearingb'ush to permit the radial move- I I 'me'nt'of said head and bush an extent sufiicient to. clear the upperiexternal boundaries bearing adjacent said flywheel. Y 

